Cooper Bussmann FRN-R-200 RK5 200A Time Delay Fuse

Product Description

The COOPER BUSSMANN FRN-R-200 is a cartridge-style, time delay fuse rated at 200 amps in a Class RK5 form factor. It is designed for general-purpose overcurrent protection in industrial, commercial, and heavy-duty residential electrical systems. The dual-element construction provides time delay characteristics that allow motor inrush currents and other temporary overloads to pass without nuisance tripping, while still providing fast response to sustained fault conditions. With an interrupting rating of 20 kiloamps at DC and a bolt-on mount type, this fuse is suited for installation in fused disconnect switches and panelboards by licensed electricians.

This fuse is appropriate for branch circuit and feeder protection in applications where motor loads, HVAC compressors, or other inductive equipment require time delay overcurrent protection. The bolt-on mount design makes it compatible with standard Class RK5 fuse holders and fusible disconnect switches rated for this fuse class. Its 39.60 mm diameter and 181.00 mm overall length conform to Class RK5 dimensional standards, ensuring correct fitment in compatible equipment.

Key Features

• 200-amp time delay rating handles motor inrush without nuisance tripping
• Dual-element construction separates overload and short-circuit response
• 20 kA interrupting rating at DC provides robust fault protection
• Bolt-on mount type for secure installation in fused disconnects and panelboards
• CE Certified, CSA C22.2 No. 248.12 Certified, and UL Listed 248-12 Class RK5
• Class RK5 form factor — physically non-interchangeable with lower-rated fuse classes

Compatibility

Designed as an OEM-style replacement or service fuse for Class RK5 fuse holders and fusible disconnect switches accepting 200-amp cartridge fuses with a 39.60 mm diameter and 181.00 mm overall length.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize and lock out the circuit at the upstream disconnect before removing or installing any fuse. Use appropriately rated fuse pullers rated for this amperage — do not handle an energized fuse with bare hands or unrated tools. Verify the replacement fuse class, amperage, and voltage rating match the equipment nameplate before installation.